Radiation curable aqueous coating compositions
a technology of aqueous coating and aqueous coating, which is applied in the direction of coating, polyester coating, coating, etc., can solve the problems of requiring greater solvent amounts for paint formulations containing vinylated alkyd resins, relatively slow “dry” or cure times of alkyd resins, and longer coatings
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example r1
Vinyl Functional Alkyd Resin and Vinyl Functional Polyol
[0133]In a standard synthetic resin reactor, 62 kg of benzoic acid, 105 kg of coconut oil fatty acid, 87 kg of pentaerythritol, and 70 kg of phthalic anhydride were heated to 230° C. Azeotropic distillation at 230° C. using toluene as azeotrope former and subsequent dilution to a mass fraction of solids 80% with toluene yielded 373 kg of an alkyd resin having an acid number of 3.0 mg / g, a dynamic viscosity, diluted with toluene to a mass fraction of solids of 50%, of 45 mPa·s, and a hydroxyl number of 120 mg / g. The alkyd resin was mixed at 90° C. with 87 kg of glycerol propoxylate having an average molar mass of 355 g / mol, 2.5 kg of p-toluene sulfonic acid, and 1.2 kg hydroquinone monomethyl ether were added as catalyst and inhibitor, respectively. After addition of 78.5 kg of acrylic acid the reaction mass was heated to 125° C. while a flow of 3 m3 / h of lean air with an oxygen content of 7% was bubbled through the reactor. At ...
example r2
tional Alkyd Resin
[0134]As in example R1, 137 kg of cotton oil fatty acid, 87 kg of pentaerythritol, and 74 kg of phthalic anhydride were heated to 230° C. Azeotropic distillation at 230° C. using toluene as azeotrope former and subsequent dilution of the resulting resins to a mass fraction of solids of 80% with toluene yielded 373 kg of an alkyd resin having an acid number of 1.5 mg / g, a dynamic viscosity, measured on a solution diluted with toluene to a mass fraction of solids of 50%, of 40 mPa·s, and a hydroxyl number of 210 mg / g. Into this alkyd resin, 2.5 kg of p-toluene sulphonic acid and 1.2 kg hydroquinone monomethyl ether were added as catalyst and inhibitor, respectively. After adding 85 kg of acrylic acid the reaction mass was heated to 125° C. while a flow of 3 m3 / h of lean air with an oxygen content of 7% was bubbled through the reactor. At 125° C., azeotropic distillation using toluene as azeotrope former was performed until an acid number of less than 30 mg / g was reac...
example r3
tional Alkyd Resin
[0135]In a standard synthetic resin reactor, 210 kg of soybean oil and 55 kg of pentaerythritol were transesterified at 265° C. using 0.03 g of lithium hydroxide as catalyst, and after adding 82 kg of phthalic anhydride at 200° C., the reaction mixture was heated to 230° C. Azeotropic distillation at 230° C. using toluene as azeotrope former and subsequent dilution to a mass fraction of solids of 80% with toluene yielded 422 kg of an alkyd resin having an acid number of 5.0 mg / g, a dynamic viscosity measured on a 60% strength solution in toluene, of 250 mPa·s, and a hydroxyl number of 90 mg / g. This alkyd resin was mixed at 90° C. with 2.5 kg of p-toluene sulphonic acid and 1.2 kg of hydroquinone monomethyl ether, as catalyst and inhibitor, respectively. After adding 42.2 kg of acrylic acid the reaction mass was heated to 125° C. while a flow of 3 m3 / h of lean air with an oxygen content of 7% was bubbled through the reactor. At 125° C., azeotropic distillation using...
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